__setup() handlers should return 1 to obsolete_checksetup() in init/main.c to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) argument or environment strings. Also, error return codes don't mean anything to obsolete_checksetup() -- only non-zero (usually 1) or zero. So return 1 from vdso_setup().

Fixes: 9a08862a5d2e ("vDSO for sparc") Signed-off-by: Randy Dunlap rdunlap@infradead.org Reported-by: Igor Zhbanov izh1979@gmail.com Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: "David S. Miller" davem@davemloft.net Cc: sparclinux@vger.kernel.org Cc: Dan Carpenter dan.carpenter@oracle.com Cc: Nick Alcock nick.alcock@oracle.com Cc: Sam Ravnborg sam@ravnborg.org Cc: Andrew Morton akpm@linux-foundation.org Cc: stable@vger.kernel.org Cc: Arnd Bergmann arnd@arndb.de --- v2: correct the Fixes: tag (Dan Carpenter) v3: add more Cc's; correct Igor's email address; change From: Igor to Reported-by: Igor; v4: add Arnd to Cc: list

arch/sparc/vdso/vma.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/arch/sparc/vdso/vma.c +++ b/arch/sparc/vdso/vma.c @@ -449,9 +449,8 @@ static __init int vdso_setup(char *s) unsigned long val;

err = kstrtoul(s, 10, &val); - if (err) - return err; - vdso_enabled = val; - return 0; + if (!err) + vdso_enabled = val; + return 1; } __setup("vdso=", vdso_setup);